... 0.2,0.25,0.5,1,3 Cylinder: 0.0 to ± 8.75 Diopters, step:0.25,0.5,1,3Cylinder Axis: 0°to 180° step:1°,5°,15° Prism: -20 to +20, step:0.1,0.5,20Prism ... form: Base up,base down,base in,base ... ,polarizing filter and R & G filterCross cylinder: ±0.50D PD: 48 to 80mm in 1 and 0.5mm step Retinoscope: +2.00D or ...